Otohime Saxum
What Otohime Saxum is
Otohime Saxum is a saxum — a boulder or rock — on Ryugu, 0.2 km across, centred at 69.8° S, 85.6° W. It is the 9th largest named feature on Ryugu and the 1st largest of its class there.
Where the name comes from
Otohime Sama; princess in Japanese fairy tale, sea mistress, who welcomed fisherman Urashima Taro in undersea Ryugu Palace and gave him a parting gift, a jewel box whose lid he was told never to open. The International Astronomical Union approved the name in 2018, under the theme it applies to every saxum on Ryugu. Of the 3 features of this class catalogued on Ryugu, the naming categories run Japan (2), United States (1).
What it would take to settle Otohime Saxum
Ryugu scores 58.1 as a world. That number is the same for every square metre of it — but sunlight, water, radiation and the ground under your feet are not. This is the same question asked at 69.8° S, 85.6° W.
What this spot has going for it is known ground — 1 km from Hayabusa2 touchdown (2019). What works against it is sunlight — 35% of the sunlight the sunniest latitude on Ryugu gets.
Computed from Otohime Saxum's catalogued latitude, longitude and feature class — 74% of the model's weight had a basis here, and 2 axes were dropped as not applicable to Ryugu (radiation geometry, earth link). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on Ryugu and are already counted in the world's own index, not again here.
What this cannot see: elevation. Slope, local shadowing and the polar “peaks of eternal light” — ridge tops near the poles of a barely tilted world that catch sun almost continuously while a crater floor kilometres away never does — need a terrain model this does not have. Where a real mission targets a pole, that is usually why.